Kazuaki Hanada

The verification, validation, and uncertainty quantification framework of the EAST tokamak diagnostic system

Shaohua Yuan, Haiqing Liu, Kazuaki Hanada, Mitsutaka Isobe et autres

Abstract The diagnostic system in a tokamak serves as the foundation for research in plasma physics, plasma operation control, and device protection. The accuracy and reliability of diagnostic data have long been critical considerations in tokamak data analysis and processing. To achieve …

cn, cz, jp, th (code pays fourni par la source)

Investigating long-duration plasma operation with the international multi-machine CICLOP database

X. Litaudon, E. Lerche, O. Grulke, Christopher Thomas Holcomb et autres

Abstract Combined high-fusion performance and long-pulse operation is one of the key integration challenges for fusion energy development in magnetic devices. Addressing these challenges requires an integrated vision of physics and engineering aspects with the purpose of simultaneously increasing time duration and …

fr, jp, de, us, cn, kr, at, gb, se, ru (code pays fourni par la source)

Full noninductive plasma start-up using electron Bernstein wave current drive on high-field side injection in QUEST

Zhou Junyao, Kazuaki Hanada, T. Onchi, Shin-Ichiro KOJIMA et autres

Electron cyclotron wave (ECW) injection is considered an effective auxiliary method for plasma start-up. In QUEST, high-field side (HFS) injection of ECW was conducted to achieve effective mode conversion to electron Bernstein wave (EBW), which can propagate in high-density plasma and provide …

jp (code pays fourni par la source)

Full noninductive plasma start-up using electron Bernstein wave current drive on high-field side injection in QUEST

Zhou Junyao, Kazuaki Hanada, T. Onchi, Shin-Ichiro KOJIMA et autres

Abstract Electron cyclotron wave (ECW) injection is considered an effective auxiliary method for plasma start-up. In QUEST, high-field side (HFS) injection of ECW was conducted to achieve effective mode conversion to electron Bernstein wave (EBW), which can propagate in high-density plasma and …

jp (code pays fourni par la source)

Experimental progress and future plans on spherical tokamak, QUEST

Kazuaki Hanada, H. Idei, T. Ido, R. Ikezoe et autres

Abstract QUEST (Q-shu university experiment with steady state spherical tokamak) aims at effective plasma current start-up and stable maintenance of plasma discharge. To solve the inherent problems in a spherical tokamak (ST) arising from insufficient space for placing the inductive center solenoid, …

jp, us (code pays fourni par la source)

Development of electron cyclotron wall conditioning with argon gas in the spherical tokamak QUEST for hydrogen removal from metal walls

Masakatsu Fukumoto, Qilin Yue, Pakkapawn Prapan, Kazuaki Hanada et autres

Abstract Electron cyclotron wall conditioning with argon gas (Ar-ECWC) has been performed on the normal conducting spherical tokamak QUEST with metal walls for the purpose of applying this technique to future superconducting fusion devices with metal walls as an inter-shot wall conditioning …

jp (code pays fourni par la source)

Development of a limiter-like Langmuir probe system for the Q-shu university experiment with steady-state spherical tokamak (QUEST) all-metal device

Yoshihiko Nagashima, Kazuaki Hanada, H. Zushi, H. Idei et autres

A limiter-like Langmuir probe system was developed to measure scrape-off layer (SOL) plasmas in the Q-shu University Experiment with a steady-state Spherical Tokamak (QUEST) all-metal device. The system is mainly made of metals such as tungsten to keep compatibility with the all-metal …

jp, fr, gb (code pays fourni par la source)

Design considerations for optimizing the transient CHI injector on QUEST

Roger Raman, Masayuki Ono, S.C. Jardin, Kengoh Kuroda et autres

Abstract Transient coaxial helicity injection (transient CHI) on the QUEST (Q-shu University Experiment with Steady-State ST) spherical tokamak (ST) has recently validated the floating biased electrode configuration for solenoid-free plasma startup. In support of a significant divertor upgrade on QUEST, the details …

us, jp (code pays fourni par la source)

Integrated operation scenarios: Chapter 6 of the special issue: on the path to tokamak burning plasma operation

Yong-Su Na, Eugenio Schuster, Robert V. Budny, Andrea M Garofalo et autres

Abstract Here we report the progress of the development and optimization of operational scenarios for ITER and beyond, focusing upon baseline, hybrid, and steady-state scenarios since 2007. This includes advancements made by the integrated operation scenarios (IOS) topical group of the international …

ELM penetration in ITB plasma on EAST tokamak

Xiang Gao, Kangning Geng, X.J. Zhang, Kazuaki Hanada et autres

Abstract The penetration of an edge-localized mode (ELM) into an internal transport barrier (ITB) plasma has been studied on the EAST tokamak with a flat central safety factor profile q(0) ∼ 1 recently. The experiment indicates that when the ELM inward penetration …

cn, jp, de (code pays fourni par la source)

Optimization of design point for a fusion energy systems integration test facility FAST

A. Ejiri, Yuichi TAKASE, N. Ashikawa, Kazuaki Hanada et autres

Abstract Fusion by Advanced Superconducting Tokamak (FAST) is a project being proposed as a facility for R&D, testing, and demonstration of systems integration for a deuterium–tritium (DT) fusion energy reactor. The required specifications for FAST are: DT fusion power of 50– 100 …

jp, gb (code pays fourni par la source)

First-principles molecular dynamics of H2 molecule formation inside hydrogenated amorphous carbon

Junko Ishii, Shigenori Matsushima, Akira Kusaba, Yoshihiro Kangawa et autres

jp (code pays fourni par la source)